PHPMailer - gmail smtp not working properly

Question

I use gmail smtp for contact form in my site.(PHPMailer script https://github.com/PHPMailer/PHPMailer‎)
my code is:

<?php
include "classes/class.phpmailer.php"; // include the class name
$mail = new PHPMailer(); // create a new object
$mail->IsSMTP(); // enable SMTP
$mail->SMTPDebug = 1; // debugging: 1 = errors and messages, 2 = messages only
$mail->SMTPAuth = true; // authentication enabled
$mail->SMTPSecure = 'ssl'; // secure transfer enabled REQUIRED for GMail
$mail->Host = "smtp.gmail.com";
$mail->Port = 465; // or 587
$mail->IsHTML(true);
$mail->Username = "[email protected]";
$mail->Password = "xxxxxxxxxx";
$mail->SetFrom("[email protected]");
$mail->addReplyTo("[email protected]");
$mail->Subject = "Your Gmail SMTP Mail";
$mail->Body = "Hi, your first SMTP mail via gmail server has been received.";
$mail->AddAddress("[email protected]");
 if(!$mail->Send()){
  echo "Mailer Error: " . $mail->ErrorInfo;
}
else{
    echo "Message has been sent";
}
?>

It works but i have two problems:

1. I set $mail->SetFrom("[email protected]");
   but in my gmail show from: [email protected]
   

2. I set $mail->addReplyTo("[email protected]");
   but in my gmail when i click replay button email replayed to [email protected]
   my code is

Answer 1

Google does not allow you to send mail on behalf of another user [aka "spoof"] unless you've explicitly been allowed. If you have not been allowed it will rewrite the address to the address of the sending account.

To add an account log into gmail, and go to Settings > Accounts > Send Mail As... when you add an address here gmail will send a message to that address asking for confirmation to allow you to send mail on their behalf.